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stoma

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sto⋅ma

  [stoh-muh]
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–noun, plural sto⋅ma⋅ta  [stoh-muh-tuh, stom-uh-, stoh-mah-tuh] , sto⋅mas.
1. Also, stomate. Botany. any of various small apertures, esp. one of the minute orifices or slits in the epidermis of leaves, stems, etc., through which gases are exchanged.
2. Zoology. a mouth or ingestive opening, esp. when in the form of a small or simple aperture.
3. Medicine/Medical. an artificial opening between two hollow organs or between one hollow organ and the outside of the body, constructed to permit the passage of body fluids or waste products.
Origin:
1675–85; < NL < Gk stóma mouth

Related forms:
stomal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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sto·ma   (stō'mə)   
n.   pl. sto·ma·ta (-mə-tə) or sto·mas

  1. Botany One of the minute pores in the epidermis of a leaf or stem through which gases and water vapor pass. Also called stomate.

  2. Anatomy A small aperture in the surface of a membrane.

  3. A surgically constructed opening, especially one in the abdominal wall that permits the passage of waste after a colostomy or ileostomy.

  4. Zoology A mouthlike opening, such as the oral cavity of a nematode.


[New Latin, from Greek, mouth.]
sto'mal, sto'ma·tal adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

stoma 
"orifice, small opening in an animal body," 1684, from Mod.L., from Gk. stoma (gen. stomatos) "mouth," from PIE base *stom-en-, denoting various body parts and orifices (cf. Avestan staman- "mouth" (of a dog), Hittite shtamar "mouth," M.Bret. staffn "mouth, jawbone," Corn. stefenic "palate"). Surgical sense is attested from 1937.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: sto·ma
Pronunciation: 'stO-m&
Function: noun
Inflected Form: plural -mas
1 : any of various small simplebodily openings especially in a lower animal
2 : an artificial permanent opening especially in the abdominal wall made in surgical procedures stoma>
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

stoma sto·ma (stō'mə)
n. pl. sto·mas or sto·ma·ta (-mə-tə)

  1. A minute opening or pore, as in the surface of a membrane.

  2. A mouthlike opening, such as the oral cavity of a nematode.

  3. A surgically constructed opening, especially one made in the abdominal wall to permit the passage of waste.

sto'mal adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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